Long-term Debt and Debt Facility Agreements - Additional Information (Detail) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	$ 5,000,000,000
Borrowings outstanding under credit facility	0	$ 0
Long-term Debt maturity in 2026	1,700,000,000
Long-term Debt maturity in 2027	1,400,000,000
Long-term Debt maturity in 2028	2,000,000,000
Long-term Debt maturity in 2029	1,300,000,000
Long-term Debt maturity in 2030	1,300,000,000
Long-term Debt maturity thereafter	3,300,000,000
Long-term debt, fair value	10,400,000,000	10,200,000,000
Commercial paper programs mature in February 2028
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	2,000,000,000
Commercial paper programs mature in December 2029
Debt Instrument [Line Items]
Committed credit facility agreement aggregated	3,000,000,000
Commercial paper borrowings
Debt Instrument [Line Items]
Long-term debt	$ 0	$ 0